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QOD#86

4-3-14. QOD#86. What is the motion of the bat swinging and the ball moving when a baseball player hits a homerun? Bat swing – circular or oscillating (depending on the swing) Ball moving – projectile & linear. 4-3-14. Distance. Distance – how far an object traveled; length

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QOD#86

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  1. 4-3-14 QOD#86 What is the motion of the bat swinging and the ball moving when a baseball player hits a homerun? Bat swing – circular or oscillating (depending on the swing) Ball moving – projectile & linear

  2. 4-3-14 Distance Distance – how far an object traveled; length Distance equation: d = xf – xi Variables: x = position d = distance xf = final position xi = initial position

  3. 0 m 5 m 10 m 15 m 20 m Ex1: d = xf - xi d = 20 m – 5 m d = 15 m

  4. 0 mi 10 mi 20 mi 30 mi 40 mi Ex2: d = xf - xi d = 35 mi – 15 mi d = 20 mi

  5. Ex3: Sarah starts her drive at the 35 mile marker. She finishes her drive at the 80 mile marker. What is the distance she traveled? d = xf – xi d = 80 mi – 35 mi d = 45 m

  6. Ex4: Paul’s car odometer reads 120 miles in his driveway. When he arrives at work it reads 147 miles. What is the distance he travels to work? d = xf – xi d = 147 – 120 d = 27 miles

  7. Air Trolley Lab Purpose: To investigate motion and distance. Question: How will the number of propeller winds affect the distance the air trolley travels? Materials: • Air Trolley • Fishing Line • Meter Stick • Calculator

  8. Procedures: • Start the air trolley behind the first black dot, which is marked on the fishing line. • Wind the propeller 10 times clockwise while holding the bottom of the trolley. • Let go. • Measure the distance in cm. • Repeat 2 more times (total of 3 trials). • Repeat steps 1-5 at 20, 30, and 40 winds. • Find the average of the trials. • Graph averages.

  9. Number of propeller winds Distance Air Trolley travels Same fishing line, turning propeller clock wise, air trolley starting place IV: DV: Constants: Hypothesis: If ________________, then __________, because _______________________.

  10. QOD#87 Brad’s boat travels from the 3.5 mile marker to the 5.5 mile marker on Mississippi River. What is the distance the boat traveled? d = xf = xi d = 5.5 mi – 3.5 mi d = 2 mi

  11. Speed Speed – the distance traveled in a certain amount of time. Speed equation: v = d Δt Variables: v = speed/velocity t = time Δt = time interval or change in time Δt = tf - ti

  12. Ex1: A car left the house at 9:30 am and arrives at 11:30 am. How long did the car drive? Δt = tf - ti Δt = 11:30 - 9:30 Δt = 2 hours

  13. Ex2: A car travels 240 miles in 4 hours. Find the speed the car traveled. v = d t v = 240 mi 4 h v = 60 mi/h or 60 mph

  14. Ex3: A car leaves home at 4:00 pm, travels 600 miles, and arrives at 8:00 pm. How fast did the car travel? (speed) v = d Δt v = 600 mi 4 h v = 150 mph Δt = tf - ti Δt = 8:00 – 4:00 Δt = 4 hours

  15. Ex4: Tom starts his trip at 9:00 am, at mile marker 150. He arrives at mile marker 200, at 9:25 am. Find the speed in miles per minutes. v = d Δt v = 50 mi 25 min. v = 2 mi./min. Δt = tf - ti Δt = 9:25 – 9:00 Δt = 25 min. d = xf- xi d = 200 mi – 150 mi d = 50 mi

  16. QOD#88 Zach runs 3 miles in 0.5 hours. How fast did he run in mph? How fast did he run in miles/minutes? v = d / Δt v = 3 mi / 0.5 h v = 6 mph v = 3 mi / 30 min v = 0.1 mi/min.

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